Testing or measuring apparatus



Nov. 30 1926.

1,608,878 B. M. w. HANsoN TESTING DR MEASURING APPARATUS Filed July 9, 1923 Patented Nov. 30, i925.

l,l.i08,878

einer aria.

BENGT M. W. HANFCE, OF VARTFCRD, CGNNECSCUTJ; EENAE A. HANSGN AND CLA-.R- ENCE E. TWHTNEY E "ECUTCl'-S OTE' BENGT llf. VJ. 'HATSOL DECEASED.

TESTNG R JEASURNG APPARATUS.

Application ilcd July 9,

This invention relates to devices for testing or measuring the dimensions, spacing, trueness7 etc., ot various kinds ot members or parts, and has particular reference to apparatus ot the type disclosed in my co-pending application Serial llloeOSled May ai, ieee.

An aim of the invention is to provide an apparatus ot this sort having various teatnres ot' novelty and advantage.

A particular aim ot the invention is to provide certain improvements in an appar tus of this sort by means ot which the instrumentalities may he quickly and readily adjusted one relative to the other, thus increasing the eliciency oit the apparatus.

@ther objects will be in part obvious and in part pointed out hereinafter.

The invent-ion accordingly consists in the features of construction, combination of elements and ar angement of parts which will be exempliiied in the construction illustrated in the accompanying drawings wherein is disclosed one embodiment which the invention `may take.

ln these drawings:

Figure l is a diagrammatic view showing the complete apparatus in side elevation, parts being in section;

Fig. 2 is a front elevation of the apparatus, certain parts being broken away tor purposes ot' clearness; and

Fig. 3 is a sectional view taken substantially on line 3 3 of Fig. 2.

Fig. d is a sectional view in side elevation yot the indicating device, this view being taken substantially on line 4-4- ot Fig. 2;

Fig. 5 is a detail view showing one of the V rests and a knife edge associated therewith.

Referring to the drawings in detail, and particularly to the diagrammatic showing of F l., a indicates a 'suitable base on the longitudinal ways o ot which is mounted for adjustable movement, means for supporting the piece to be tested as, tor instance, head and tail stocks, one of which is designated by the letter c. These respective stocks may have centers CZ and e, shown in Fig. 2. Also, mounted on the base for adjustment in parallelism with the way is a ulcrum member or rest f on the top ot which is tulcrumed, by means ot knife edges g, :a swinging support or arm carrying on 1923. Serial No. 655,292.

its forward end a longitudinally extending head or bracket a' provided with ways 7c in which an indicator slide Z is mounted. Secured to this slide is an indicator mechanism which includes a point fnJ adapted for engagement with the piece to be tested, an indicating linger 0, and a connection between the point and linger through which a slight movement ot the point causes a relatively large movement ot the linger. This connection may include a point lever l0 carrying at its lower end the point n and tulcruined adjacent its lower end in a V rest ll; a link lever l2, and a magnifying lever lil, the latter being tulcrumed as at lll, and the opposite ends ol the link lever being pivotally associated with thc point lever and the magnifying lever by means of the knilie. edges l5 and 16. The magnifying lever in the form of an inverted U straddling the right hand end ot the lever l2. Secured to the lower end ot this magnifying lever is weight l0() which serves as a counterbalance in that it normally maintains the magnifying lever and the finger 0, which is welded or otherwise secured to the weight, in vertical position. The V rests i7, in which the knife edges let engage, are lined, being carried, in the present instance, by the back plate i8 oi the ycasing 19 which houses the indicator. The parts of the indicator are maintained in cooperative relation by the spring 20. For the purpose ot accurately indicating thc proper positioning ot the indicator relative to the piece of work being tested, suitable mechanism is provided which may take the 'torni ot the drop pin arrangement designated generally by 4the letter j?. rThis drop pin arrangement includes a plunger mounted for sliding movement in a bracket 3l secured to the lett hand end ot the head or slide bracket F ined to the plunger 30 is a collar 32 behind which aspring vso that the plunger is normally urged towards the right, referring to Figs. 2 and 3. Carried by the collar and a portion ot the bracket 3l are a pair ot alined studs 3ft and 35 between which the drop pin 86 is adapted to be positioned. Rough 'adjustment of the slide. Z, together with-the parts carried thereby, may be effected by turning a knob q directly mounted on the screw r associated with the slide Z, andtine adjustment is eilected by turning the knob s, which may ,he connected to the screw 1", through the, intermeshing pinion t and gear u. In Fig. 2, the pinion and gear are shown out of mesh. To bring them into mesh, the knob s is pulled out. Disposed opposite to the operative end of the plunger 30 of the drop pin arrangement, and carried by, in the present instance, the housing 19 is an anvil 40 between which and the plunger suitable gauge blocks may be selectively interposed. These gauge blocks may rest on the surface 41, one ot the gauge blocks being shown in the drawings and indicated by the nume-ral 42.

In accordance with the present invention, I provide the apparatus with means tor designating; when the indicator has been adjusted within a relatively small linutto'its proper position, the advantage or" this being that considerable time may be saved. in adjusting the indicator in that the indicator may be quickly moved almost to its iinal position and when this point is reached, the operator will be notified that such is the case, and only thereafter is it necessary for the operator to slowly adjust the indicator. Since, in the present instance, the drop pin arrangement is provided ttor indicating the proper positioningot the indicato-r, my improved means for signalling or designating when the indicator has been almost brought to its final position is associated with the drop pin arrangement. present instance, this designating or signal device includes a pin 50 extending through and slidably mounted in the anvil 40, and a designating` lever51 the short end of which is acted upon by movement ot' the pin 50. rll'he pin 50 normally extends beyond the face or" the anvil but a very slight extent, say one one-thousandth ot' an inch. The pin 5() has a head 52 against which engages a knife edge 53 on the lower end of the lever 51. The lever 51 is pivoted or fulcrumed by means ot a knife edge as at 54. The upper end ot the lever 51 is adapted to move over a scale 55. It will be noted that the vertical distance between the point ot' engagement of the lever 51 against the pin 50 and the fulcruin point 54 is extremely small as compared with the long; end of the lever so a very minute movement ot the pin 50 will be registered by a relatively large movement ot the long' end ot the lever over the scale 55. The lever is held in operative position by a spring 56.

The operation ot the apparatus is briefly as follows,V The piece to be tested, such as the screw `threaded member 1.0, is placed between the centers d and e, and the tulcrum rest f, together with the parts carried thereby, is adjusted so that the` point n may be brought into engagement with the work. The drop pin 36 is positioned between the studs 34 and 35 so that it is horizontally disposed as shown in the drawings, and then ln the i the slide l. ton/'ether with thc indicator carried thereby, is quickly or roughly adjusted relative to the di' p pin arrangement by turning' the knob Q. Assuming that the gauge block l2 is not used in the first instance, when the indicator has been brought almost to its tinal position, the protruding end ot the pin 50 will engage the plunger 30, causing the pin to move to the right and thereby swing the designating lever 51. The operator, upon observing' movement ot the designating lever 51, will know that the indicator has been brought approximately, that is to an estreinely small limit, to its proper position. Then the knob s is pulled out to intermesh the gears t and u, and the knob s is slowly turned bringing the anvil against the end ot the plunger lll, and when this engagement takes place, lthe drop pin will start to tall indicatingthat the indicator has been brought to the proper position, rllhe jforward end of the swinging arm ,7L is then lowered to bring the point n into engagement with the work, and the work is longitudinally adjusted to a position where the point equally engages both sides ot the thread groove at which time the indicator finger 0 will stand at zero. Then the indicator is raised, the drop pin is reset, a gauge block 4-2 corresponding to the lead ot the thread to be tested is positioned as shown in Figs. 2 and 3, the indicator is quickly moved by the knob fg until the signal device, owing to the engagement of the protruding end ot the pin 50 against the gauge block 42, signiiies to the operator that the anvil is in close proximity to the gauge block, and then the indicator is slowly moved by turning the rnob s until the anvil is in engagement with the gauge block, this engagement being,T designated by the falling movement of the drop pin 36. The point n is then engaged in one of the successive convolutious ot the screw thread, and it the lead of this thread is not absolutely correct, the tree end ot the indicating linger 0 will stand to one or the other side ot the Zero mark ot the scale o and thus register the extent ot inaccuracy in the lead. It is, of course, understood that with the arrangement described a slight movement ot the point n is magnified many times Vin the linger 0 so that the extent oi inaccuracies in the lead may be determined with the utmost precision. lt will also be seen that a relatively slight movement ot the pin 50 will be registered as a relatively large movement by the free end ot the designating lever 51 so that the operator will be instantly apprised of the movement ot the pin 50 against the plunger Z.l1 or the gauge block 42, as the case may be. Thus, the operator may quickly bring the indicator into close proximity to its proper position relative to the drop pin arrangement and then, by turning the knob s slowly advance Leaders the indicator towards the drop pin arrange ment and, by observing` the extent of movement of the designating lever 5l over the scale 55, this iinal setting may be brought about with a saving* of time.

The l! rests tor the several lrnit'e edges are ot a novel construction. These V rests are similar in arrangement so that it is sufficient to describe but one of them, for instance the rest ll 1or one knife edge. This il rest includes a pair ot blocks GO and 6l positioned in a recess 62 in a part or support 63 and may be held in this recess by the screws 6ft. The two bloclrs have abuttin g plane surfaces G5 and the Correspending` corners ot the blocks, where these bloclrs meet, are bevelled as at G6 so as to form a symmetrical V. rEhe reason for this arrangement is that from a practical standpoint it is very diiiicult, to say the least, to cut in a solid block a V, the corner or angle ot which is accurate and sharp. lVith the present arrangement, however, the V rest may be made with eXtreme accuracy at a greatly reduced cost. latter the sides ot the blocks and (il have been properly faced, they may be positioned side by side in accurate alinement, and then the eorrcsiiondingj corners of the blocks may be bevelled ofi with the assurance that these two hevelled faces are at the same angle. The blocks are then positioned in a recess G2, as shown most clearly in Fig. 5, and, obviously, where the bevelled faces meet is a sharp, accurate corner which receives the imite edge.

As previously stated, the showing in the present instance is by way of illustration only. It is, ot course, obvious that the apparatus may be employed tor testing other than screw threaded members and the parts may be variously arranged.

l claim as my invention: i

'1. ln an apparatus ot the character described, an indicating device, means having a deiinite relation to the apparatus 'tor supporting a piece to be tested, means tor indicating; the positioning;f orp said indicator rela.- tive to the piece to be tested.v means for adjusting said indicator relative to said position indicatingv means. and means for desiguating; when said indicator has bee brought into the approximate desired position relative to the piece to be tested.

2. In an apparatus et the character de scribed, an indicator including a point and an indicating finger associated therewith, means having a deiinite relation to the apparatus for supporting a piece to be tested, a drop pin arrangement ter designating; when said indicator has been brought into proper position relative to the work and including a pin adapted to be heid by pressure in other than a vertical position and to be turned by gravity when the pressure is relieved, means tor adjusting said indicator relative to said arrangement, and means tor designating when said indicrdiul has been brought into close proximity to the proper position relative to said crop pin arrange ment.

3. in an apparatus et the character dcscribed, an indicator including a point and an indicating tingger associated therewith, means having` a definite relation to the apparatus 'tor supporting piece to be tested, a drop pin arrangement for designatin@` when said indicator has been brought into proper "elation to the piece to be tested and including a pin adapted to be held by pressure in other than a vertical position and to drop when the pressure is relieved, means tor adjustingsaid indicator relative to said rangement, and means adapted to cooperate with said dro )in arinnffeinent and includ ing a distance multiple arrangement tor designating` when `said indicator has been adj usted into close proximity to the proper position relative to the drop pin arrangement.

4l. In an apparatus ot the character described, an indicator, means haring,` definite relation to the apparatus ttor supportingl a piece to be tested, a drop pin arrange-ment tor designating when said indicator has been brought into proper relation to the piece to be tested and including` a pin adapted to be held by pressure in other than a vertical position and to drop when the pressure is relieved, means for adjusting said indicator relative to said drop pin arrangement, and means including a magnifying lever 'for designating when the indicator has been adjusted into close proximity to its proper position relative to said drop pin arrangement.

5. In an apparatus ot the character described, an indicator including' a point and an indicating' linger associated therewith, means having a definite relation to the apparatus for supporting' a piece to be tested, means itor indicatingthe proper positioning ot said indicator relative to the piece to be tested, means tor adjusting said indicator relative to said first mentioned means, and means for designating when said indicator has been adjusted into close proximity to its proper position relative to the piece to be tested and including' a member adapted to cooperate with said lirst mentioned means when the indicator has been brought into close proximity thereto and a designating lever adapted to denote the extent ot' movement ot said member.

6. In an apparatus ot the character described, an adjustable mounting, means having a definite relation to the apparatus for supporting, a piece to be tested, an indicator mounted thereon including; a point and an indicatingfinger associated therewith, a drop pin arrangement tor designating when said indicator has been brought into proper relation to the piece to tested and includ ing a pin adapted to be held b y pressure in other than a vertical position and to drop when the pressure is relieved, a surface carried by said mounting and cooperatively positioned relative to said drop pin arrangement, means tor adjusting` said mounting` relative to said drop pin arrangement, a pin located tor sliding movement on said mounting and extending slightly beyond said surface, and a designating lever pivotally carried'by said mounting,Y and acted upon by movements of said pin.

7. ln an apparatus of the character described, an adjustable mounting, means having' a definite relation to the apparatus for supporting a piece to be tested, an indicator carried thereby and includingl a point and an indicating finger associated therewith, means Yfor indicating the proper positioning of said mounting and thel indicator carried thereby relative to the piece to be tested, means for adjusting said mounting relative to said position indicating means, and means for desi gnating when said indicator has been broughtinto close proximity to the desired position relative to the piece to be tested.y said last mentioned means including a longitudinally movable pin carried by said mounting and adapted to engage said position indicating means slightly before the mounting engages the same and a lever pivoted in the mounting and having a relatively short end engaging said pin and a relatively long end denoting,` the extent of movement of the pin.

8. ln an apparatus of the character described, an adjustable mounting, means having a definite relation to the apparatus for supporting a piece to be tested, an indicator carried thereby and including' a point and an indicating finger associated therewith, means for indicating the proper positioning` of said indicator relative to the piece to be tested, means for designating when said indicator has been brought into close proximity to the correct position relative to said position indicating` means, a screw'associated with said mounting,` for adjusting the same, means for rotating said screw at a relatively fast rate of speed to roughly adjust said indicator, and means associated with said screu7 for slowly rotating the same to effect afine adjustment of said indicator.

BENGT M. lV. HANSON. 

